Insect-exterminating apparatus



No. 623,374. Patentd Apr. l8, I899. T. JOHNSON.

INSECT EXTEBIINATING APPARATUS.

(Application filed Nov. 21, 1898.)

(No Model.)

UNTTan STATES PATENT FFICE.

THOMAS JOHNSON, OF ST. LOUIS, MISSOURI.

lNSECT-EXTERMINATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 623,374, dated April 18, 1899.

Application filed November 21, 1898. Serial No. 696,997. (No model.)

To all whom it may concern:

Be it known that I, Tnonn's JOHNSON, a citizen of the United States, residing at the city of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Insect-Exterminatin g Apparatus, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to a device for killing insects by means of a blast of hot gas, the device comprising, essentially, a fount for holding hydrocarbon oil, a gas burner and generator, a blast-tube, and a pump in connection with said fount for forcing the oil to said burner.

My invention consistsin the construction and details of construction hereinafter described and claimed.

Figure I is a perspective view of the apparatus. Fig. II is a vertical sectional View taken through the gas-generator. Fig. III is a horizontal sectional View taken on the line III III, Fig. II. Fig. IV is a horizontal sectional view taken on line IV IV, Fig. III. Fig. V is a vertical sectional view through the fount, showing the air-pipe from the pump.

1 designates the fount of the apparatus, which is adapted to contain hydrocarbon oil, such as gasolene.

2 designates a pump-cylinder that contains apiston provided with a handle 3. The pumpcylinder is connected by an arm 4: with the upper end of the fount and by a tube 5, that provides a communication between the interior of said pump-cylinder and the interior of the fount. The pump-cylinder is adapted to serve as a handle by which the apparatus is carried.

The fount 1 is provided with an inlet closed by a cap 6. Leading from the tube 5 on the interior of the fount is an upwardly-extending pipe 5, that communicates with a tube 7 at the top of the fount, (see Fig. V,) the opening in which on the interior of the fouut' is controlled by the inner end of a valve 8,

when said outlet is opened by unseating the valve 8. When sufficient compression of air within the fount is obtained, the valve 8 is moved inwardly to its seat, thereby shutting off the return of air through said interior pipe to the tube 5 and pump-cylinder.

9 designates a pipe having communication with the interior of the fount l and leading upwardly therefrom. On this pipe is a cupring 10, provided with ports 11. Seated on the cup-ring 10 is a slotted cylinder 12, that surrounds the pipe 9,allowin g a space between it and the pipe. 13 is a ring that surrounds the slotted cylinder 12 and above which is mounted a cap 14, having a central opening 15, corresponding to the-interior of the cylinder12. These parts constitute the generator of the apparatus in which the hydrocarbon oil is subheated to produce gas. The cap 14 is provided with a tangential inlet-16, and on the interior of the cap at said inlet is a wing 17, that deflects the jet of gas entering the generator during the operation of the apparatus, as will hereinafter appear.

18 designates a pipe leading from the pipe 9 at the upper end thereof, said pipe 18 being provided with a jet-tube 19, containing a needle-valve controlled by a valve 20. The jet of the jet-tube 19 is arranged at the entrance of the inlet 16. (See Fig. I.)

21 designates a tube located at the top of the pipe 9 and having communication with said pipe. The communication between the pipe 9 and tube 21 is controlled by a needlevalve 22.

23 is an air-chamber provided with a port 21L, said chamber being connected to the tube 21.. The chamber 23 carries a blast-tube 25, having air-inlets 26, said blast-tube being open to communication with the air-chamber 23 and also open at its outer end.

27 designates a shield that protects the opening 15 at the top of the generator to protect the interior of the generator from the ingress of strong air-currentssuch, for instance, as would be encountered where the apparatus is used in the open air.

In the practical use of the apparatus the fount 1 has. hydrocarbon oil introduced into it, and the valve 8 being turned to unseat it in the tube 7 the pump is operated by manipulating the piston-handle 3 to inject air into the fount and cause compression therein.

The jet-opening in the jet-tube 19 is then opened by turning the Valve 20, and after a quantity of hydrocarbon oil has been permitted to escape into the generator and fall into the cup-ring the oil is ignited and the jetopening is closed until the oil admitted to the v generator has been consumed and the generator and pipe 9 have become heated. At this time the heat of the tube and generator has become suflicient to heat the ascending oil in its flow through the pipe 9 and create it into gas as it ascends. The jet-tube 19 is again opened and the gas escapes into the generator through the inlet 16 and, burning in the generator, keeps the flowing oil superheated to continue the transformation of the oil into gas. The valve in the tube 21 is then opened by operating the valve 22 to permit the flow of hot gas from.the pipe 9 into the air-chamber 23, where it combines with fresh air entering said chamber through the port 24 and the air-inlets in the blast-tube 25, thereby causing a hot blast of gas to be directed through the blast-tube 25 to its outer end. The blast escaping through the open outer end of the blast-tube is of great intensity, and when the said tube is directed to discharge the blast of gas against insects they are readily killed.

This apparatus is especially valuable in exterminating insects on vines, plants, 860., but may be available in destroying them whereverfound.

Iclaim as my inventioncating With said fount, a jet-tube-having communication with said pipe, a blast-tube having communication with said pipe; anda gas-generatorcomprisinga cup-ring, a slotted cylinder; an outer ring surrounding said cylinder, and a cap surmounting said outer ring and cylinder, substantially as set forth.

2. In an insect-exterminator, the combination of a fount, a pump having communication therewith, a pipe having communication with said fount, a jet-tube carried by said pipe, a blast-tube carried by said pipe; and a gas-generator surrounding said pipe and comprising a cup-ring having air-inlets, a slotted cylinder on said cup-ring, an outer ring surrounding said cylinder, a cap having a central opening and provided with an inlet, substantially as described.

3. In an insect-exterminator, the combination of a fount, a pump having communication therewith, a pipe having communication with said fount, a jet-tube carried by said pipe, a blast-tube carried by said pipe, a gasgenerator surrounding said pipe and open, at

generator arranged to protect the open end thereof, substantially as set forth.

THOS. JOHNSON.

In presence of E. S. KNIGHT, STANLEY STONER.

its upper end, and a shield surmounting said 

